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1.
The ethanolic extracts of the leaves and seeds of Bixa orellana showed a broad spectrum of antimicrobial activity. The activity of the leaf extract was more pronounced. 相似文献
2.
The analgesic activity of the methanolic extracts of the roots and leaves of Calliandra portoricensis was investigated in mice and rats using acetic acid-induced writhing and formalin tests. The extracts given orally at the doses of 200, 400, 600 mg/kg showed a dose-dependent activity in the tests used. 相似文献
3.
通过对秤锤树种子甲醇浸提液的生物测定研究,探讨了秤锤树种子休眠与种子内源抑制物的关系。研究结果表明：秤锤树种子不同浓度的甲醇浸提液（25％、50％、75％、100％）对白菜籽发芽率、苗高和根长的生长均有一定的抑制作用。而且,浓度越高,抑制作用越明显,其中用25％、50％、75％和100％的浸提液处理白菜籽,其发芽率分别为82％、77％、68％和58％,根长分别比对照大约降低了27％、47％、67％和％74％,苗高分别比对照大约降低了20％、40％、60％和80％。表明秤锤树种子中存在某些抑制种子萌发的物质成分,这也是导致秤锤树种子深休眠的主要原因之一。 相似文献
4.
The analgesic properties of dried leaves of Capraria biflora were investigated. The aqueous extract (50-200 mg kg(-1)) produced moderate inhibition of acetic acid-induced writhing in mice. At the same doses, a better analgesic effect was observed on the hot plate test. 相似文献
5.
Crude extracts of Lychnophora pohlii were tested in vitro against trypomastigote forms of Trypanosoma cruzi, and the dichloromethane and methanol crude extracts from leaves plus inflorescences were found to have trypanocidal activity. The bioassay-guided fractionation of the extracts yielded seven active compounds: the sesquiterpene lactones lychnopholide, centratherin, goyazensolide and 15-desoxygoyazensolide in the dichloromethane extract, and caffeic acid and the flavonoids luteolin and vicenin-2 in the methanol extract. One active caffeoyl quinic acid derivative was isolated from the inactive hydroalcoholic extract of leaves plus inflorescences. Chemically, the plant has sesquiterpene lactone type furanoheliangolides, flavonoids, caffeic acid, a caffeoyl quinic acid derivative, which are characteristic of the Vernonieae. 相似文献
6.
The aqueous extract of Persea americana leaves produced a dose-dependent inhibition of both phases of formalin pain test in mice, a reduction in mouse writhing induced by acetic acid and an elevation of pain threshold in the hot plate test in mice. The extract also produced a dose-dependent inhibition of carrageenan-induced rat paw oedema. The results obtained indicate that the extract possesses analgesic and anti-inflammatory effects. 相似文献
7.
Antibacterial activity of Picrasma javanica 总被引：1，自引：0，他引：1
The methanol extracts of Picrasma javanica, leaves, seeds, stem and root barks were partitioned (petrol, dichloromethane, ethyl acetate, butanol). All obtained extracts and fractions showed a broad spectrum of antibacterial activity, while none was active against the tested moulds. 相似文献
8.
Shankarananth V Balakrishnan N Suresh D Sureshpandian G Edwin E Sheeja E 《Fitoterapia》2007,78(3):258-259
The methanol extract of leaves of Aegle marmelos at a dose level of 200 and 300 mg/kg showed significant analgesic activity on acetic acid-induced writhing and tail flick test in mice. 相似文献
9.
《Fitoterapia》2013
Pistachio (Pistacia vera L.) nuts are a rich source of phenolic compounds, known for their high antioxidant activity, and contained not only in the seeds but also in the skin. A pistachio cultivar of high quality is typical of Bronte, Sicily, Italy. The purpose of our study was to investigate the chemical composition and antioxidant properties of two polyphenol-rich extracts from skins (TP) and decorticated seeds (SP) of Bronte pistachios, and to verify the potential use of these extracts for topical photoprotective products.Chemical analysis showed that the TP and SP extracts contain high levels of phenolic compounds, but the TP extract is about ten times richer in phenols than the SP extract, being anthocyanins the most abundant compounds found in the TP extract. Both these extracts, and especially the TP extract, possess good radical scavenger/antioxidant properties, as shown in a series of in vitro assays carried out using homogenous and non-homogenous chemical environment. Furthermore both the TP extract and, although at a lower degree, the SP extract reduce, when topically applied, UV-B-induced skin erythema in human volunteers. These findings suggest that extracts from Bronte TP and SP could be successfully employed as photoprotective ingredients in topical cosmetic and pharmaceutical formulations. 相似文献
10.
研究了长白落叶松未分解和半分解枯落针叶的水浸液处理对红皮云杉种子和长白落叶松种子萌发的不同生物效应。对于长白落叶松种子萌发来说,长白落叶松半分解和未分解枯落针叶水浸液4.0 g/L浓度的处理效果均为最佳;而对于红皮云杉种子萌发来说,10.0 g/L浓度或0.5～1.0 g/L浓度的处理效果为最佳。长白落叶松枯落针叶水浸液处理对长白落叶松自身种子和对红皮云杉种子萌发的作用均有很大的差异,推测这是长白落叶松枯落针叶水浸液中所含的化感物质和营养物质与长白落叶松和红皮云杉萌发过程中种子产生的不同代谢物质之间不同相互作用的反映。 相似文献
11.
The methanolic extracts and the fractions (petrol, dichloromethane, ethyl acetate, butanol) obtained from the leaves, seeds, stem and root barks of Sarcocephalus coadunatus exhibited a high level of broad spectrum antibacterial activity. The activity was more pronounced in the dichloromethane, ethyl acetate and butanol fractions of the leaves; ethyl acetate and butanol fractions of the seeds; dichloromethane fractions of the stem bark and the ethyl acetate fractions of the root bark. None of the fractions showed any antifungal activity. 相似文献
12.
Chloroform, ethanol and ethyl acetate extracts of Cynara scolymus L. leaves, heads and stems were tested for their antifungal activity using the agar-well diffusion assay technique. The leaves extracts and the ethanol fractions were found to be the most effective extract against all the tested organisms. 相似文献
13.
Evaluation of the anti-inflammatory and analgesic properties of Chasmanthera dependens leaf methanol extract. 总被引：1，自引：0，他引：1
A methanol extract of the dried leaves of Chasmanthera dependens was investigated for anti-inflammatory and analgesic activities. The extract (100--400 mg/kg, p.o.) produced dose-related inhibition of carrageenan-induced paw oedema and cotton pellet-induced granuloma in rats. Furthermore, an inhibition in the leakage of Evan's blue induced by acetic acid was observed in mice. At same doses, analgesic effect was also observed on writhing response induced by acetic acid as well as on the early and late phase of formalin-induced paw licking in mice. 相似文献
14.
杜仲叶提取物的抑菌活性研究 总被引：1，自引：0，他引：1
为了发现新的抑茵材料,对杜仲叶70％(体积分数)乙醇提取物及其分级组分进行了抑菌试验.结果显示:杜仲叶的乙醇和乙酸乙酯提取物对细菌和真茵都有抑制作用,而且乙酸乙酯提取物对黄曲霉和黑曲霉有特殊的抑制特征;正丁醇和水提取物对细菌有抑制作用,但对真菌几乎没有抑制作用;石油醚提取物几乎对细菌和真茵都没有抑制作用.最大抑茵圈直径超过了10 mm,最小抑茵浓度(MIC)在0.25％～3.0％之间.杜仲叶提取物在抑菌活性方面具有一定的热稳定性,抑茵率随时间而逐渐增加,16 h之后基本保持不变. 相似文献
15.
Gupta M Mazumder UK Chaudhuri I Chaudhuri RK Bose P Bhattacharya S Manikandan L Patra S 《Fitoterapia》2002,73(2):168-170
Petroleum ether and methanolic extracts of leaves of Eupatorium ayapana were tested for their antimicrobial activity. The petroleum ether extract showed higher antibacterial and antifungal activity than the methanolic extract. 相似文献
16.
The aqueous and methanolic extracts of Emilia sonchifolia leaves progressively reduced rat paw oedema induced by subplantar injection of albumin, the aqueous extract showing a more pronounced effect than the methanol extract. 相似文献
17.
The methanolic extracts of the leaves, stem bark, root bark, fruits and seeds kernels of Butyrospermum paradoxum have been evaluated for their phytochemical constituents, antibacterial and antifungal properties. 相似文献
18.
Sulaiman MR Hussain MK Zakaria ZA Somchit MN Moin S Mohamad AS Israf DA 《Fitoterapia》2008,79(7-8):557-561
The aqueous extract of Ficus deltoidea leaves was evaluated for possible antinociceptive activity in three models of nociception, namely, acetic acid-induced abdominal writhing, formalin and hot plate test. The results of the present study showed that intraperitoneal administration of the F. deltoidea leaves aqueous extract at the dose of 1, 50 and 100 mg/kg, 30 min prior to pain induction produced significant dose-dependent antinociceptive effect in all the models used, which indicating the presence of both central and peripherally mediated activities. Furthermore, the antinociceptive effect of the extract in the formalin and hot plate test was reversed by the non-selective opioid receptor antagonist naloxone suggesting that the endogenous opioid system is involved in its analgesic mechanism of action. Thus, the present results demonstrated that F. deltoidea leaves aqueous extract contains pharmacologically active constituents which possess antinociceptive activity justifying its popular therapeutic use in treating conditions associated with the painful conditions. 相似文献
19.
通过杉木种子发芽试验测定杉木枯枝落叶、半分解枯枝落叶、鲜叶、枝干、树皮、树根及根际土壤不同浓度水浸液对杉木种子发芽过程的影响。结果表明,不同浓度杉木各器官及其根际土壤水浸液对杉木种子发芽有不同的影响;与对照相比,其作用效应均表现为高浓度时抑制杉木种子的发芽,随着浓度的降低其抑制作用减弱、消失或转变为促进作用;其中,杉木根及枯枝落叶的水浸液对杉木种子发芽的抑制作用最强。 相似文献
20.
喜树叶提取物的抗菌活性研究 总被引：1，自引：0，他引：1
采用滤纸片法研究喜树叶乙醇提取物和水提物对金黄色葡萄球茼（Staphylococcus aureus）、大肠杆菌（Escherichia coli）、枯草杆茼（Bacillus subtilis）、八叠球菌（Sarcina ventriculi）、黑曲霉（aspergillus niger）、木霉（Trichoderma virid）和青霉（Penicillium chrysogenum）的抗菌活性。结果表明,喜树叶乙醇提取物和水提物对细菌有明显的抑制作用,浓度越大抑制效果越好;喜树叶乙醇提取物对3种霉菌都有抑茼效果,水提物对霉菌没有抑制作用。 相似文献